Motor-controlling apparatus



HJSJ M N. E. BAKER MOTOR, CONTROLLING APPARATUS Filed June 11, 1928 E. mO m K Q W N n WMU. WN @w um mw @MJ EN MW um Sw vm mw wm. am um wm Nm NNNN NN am m QN mm Q mw w@ 1 1 1 amw m.. N 1 uvm. QN @Naw mow Nm PatentedApra 9, 1929.

entre titane n stares earsarerries,

NORVAL E. BAKER, OF BLUE ISLAND, ILLINOIS, ASSIGNOR TO THE UNION SWITCH&

SIGNAL COMPANY, OF SVJISSVALE, EENNSYLVANIA, A'CORPORATION OF PENN-SYLVANIA.

Applicativi mea :rune 11,

My invention relates to motor controlling apparatus and particularly toapparatus for controlling a motor from a remote point. Apparatusembodying my invention is particularly adapted for, though in no Waylimited to, use in railway braking Asystems comprising a braking barlocated in the trackway and actuated by a. motor controlled from adistant point.

l will describe one form ot motor control# ling apparatus embodying myinvention, and will then point out the novel features thereof in claims.

The accompanying drawing is afview, partf ly diagrammatic, illustratingone form of railway braking system including motor con trollingapparatus embodying'my invention. Referring to the drawing', thereference characters 1 and @designate the track rails o'a` stretchotrailway track.` Located on opp'osite sides of rail 1 and extendingparallel therewith are `two braking bars 2 and Similar braking bars 2aand3a extend parallelV with rail 1a on opposite sides thereof.

The braking bars 2, 3, 2L and 3fL are operated by a. motor, which ashere shown is of theilui'd pressure type and comprises-a cylinder Acontaining a reciprocable piston 14 to which is attached a piston rod13. The braking barsV are operatively connected with the piston rod 13through suitable linkworlt including a bell crank 5 and a. lever etpivote'd at point 4t, 1When piston 111 moves to the lett each brakingbar is moved toward the associated rail into its'bralri'ng position in'which it engages thevside of a wheel of a railway vehicle traversing therails 1 and 1a. When the pistonlL moves to the right,`however, into theposition in which it is illustrated in the drawing,the braking bars aremoved away frornthe associated rails out of engagement with the wheelsof a passing vehicle and the bars then occupy their non-brakingpositions.

The supply of fluid pressure, usually con1- pressed air, to the cylinderA is controlled by main airV valves 27 ,30, 33 and 35, which main valvesare in turnV controlled by three electromagnetic pilot valves 1R, P andN. Each of these pilot valves comprises a valve body 18 having a valvestein 19 therein controlled by a magnetdesignated vbyv the referencecharacter 17 with a suitable distinguishing exponent. The valve stem 19is biased to its lupper or normal position by a spring 20 and when insuch MOTOR-CNTRQLLING APPARATUS,

1928. Serial No. 284,329.

position connects the associated pipe 22 with atmosphere through a vport21. When magnet 17 is energized the stem 19 moves downwardly against thebias eXerted by spring 20,

to its reverse position, and the associated pipe 22 is then disconnectedfrom atmosphere andl is connected with' la source ot iluid pressure, notshown in the drawing, through pipe 38.

The main air valves are located in a valve body 39. This body contains acylinder having a reciprocable piston 24 therein. The upper side of thispiston is subjected tothe pressure in pipe 22 from valve R, Carried byVpiston'2d is the mainvalve 27 biased to its upper or normal position'by spring 28. When valve R is de-energized,'piston 24 and valve 27 arein Atheir upper positions and port 37 is disconnected from port 25 andpipe 15 leadingv to the turn 'controlsthe main air valve 30 adaptedv toat times connect port 25 witlratmosphere through port31. vl/Vhen valvel? is cle-energized and valve 27 .is closed, pistonv29 and valve30,1nove into their lower positions in which they are shown:v in` thedrawing, under the influence of gravity.yl l When valve 27 is open,however, fluid pressure in port 25 will raise valve 30, allowing thisfluid pressure to exhaust to atmosphere through portA 31 unless valve l)is energized. When valve P is energized, the upper side oit piston 29 isveX- posed tothe pressure in the associated pipe 22. Since the area ofpiston 29 is greater. than that of valve 30, the valve 30 will thenbeheld in its lower position even if valve 27 is open, and communicationbetween portsv25 and 31 will thus be interrupted.Y y l l y l u similarn'iannervalve N'controls Athe pres sure appliedv to the upper `side ofpiston 32 reciprocable vin valve body 39 andcontrolling the two main airvalves 33 and 35. A spring 36 biases the piston 32 and the valves con-ltrolled therebyv to their upper-positions Vin whichl pipe 1,6 leading tothe left-hand end of the cylinder A is connected with atmospherethrough' port 40, valve 33and VportY 3st. VV-hen kvalve N isenergized,'pressure from `pipe 22 lpressure to theilett-hand end otCylinder A through port 37, valve 35, port 40 and pipe 16. The pilotvalves :l-,P and N are controlled by a series of pressure responsivedevices D,

E and F each comprising a Bourdon tube 12 communicating uf'ith theright-hand end oi" cylinder A through a pipe 6. Each Bourdon tube 12controls. a contact arm 7 which engages one of the associated fixedcontacts7.EL or 7' according tothe `pressure in the cylinder. Y Thedevices l), E and l" are adjusted to operate upon diilerent pressures sothat as 'the pressure in the Ycylinder increases these devices operatesuccessively, When no pressure exists inthe right-hand end of cylinderA, all contacts 7 7LL areclosed. il] hen the pressure in the cylinderreaches a predetermined low value, such for example, as 25 lbs. persquare inch, contact 7 7EL Voi ldeviceD opens. `When the pressureexceeds this value, contact7 7bgof device D is closed. In similar mannervdevices, E and l? operate as the pressure reaches and exceeds certainhigher values such i'or example as 60 and 75 lbs. per square inch,respectively.

rlhe magnet 17R ot pilot valve may be controlled by contact-7 7@ of anyone of the devices 1)11, or F, dependingupon the .Y position of aselector designated by theV ref-` erence character H.- The. selector Hmay be located at a point remote from the braking apparatus, as in thecontrol cabin of a classification yard car retarder system, and in thelform here shown, comprises a manually oper- Aable lever 8 adaptedk toengageV any one of v'several lixed contacts 10N, 1OD,1QE, 10F or 10i".rihe selector H alsofcomprises a segment contact lOPso disposed thatwhen lever 8 engages any one oit the contacts 10D, 10E, 101", 0r 103,the lever also engages Vthe segment contact 10P, but tliat'lever 8Y doesnot engage` segment 101.j when contact 8 10N is closed.

lllagnet '17p is controlled in part by a relay G which is in turncontrolled by a selectedv one o12 the devices D, lll or l?, dependingupon the position of selector H, as will appear hereinatter. Y f Y f .vrl`he selector H controls the .supply of energy to magnets 171", 171,and 17 N, from a source oi" yenergy such as a battery` 51 having oneterminal constantly connected with one terminal of each ol the magnetsthrough a wire 541-. The other terminal of battery l51l is connectedwith lever 8.V e i. .l As shown in the drawing, allco'ntactsof theselector l-l are open, and all valves'R, llj and N are cle-energized, sothat valves 27 and 35 are closed and valve 33 is open. Valve 30 is closd dueto the weight of piston 29. Pis ton .14; of motor A occupiesitsright-liand position, and the braking bars are retracted to theirnon-braking positions. The supply )f of pressure to both ends-oit themotor A is .tained at 25 lbs. per square inch. Y

ln similar manner, it lever 8 is movedin'to interrupted and contacts 77@ of` all de-i vices D, E and F are closed. Relay G is deenerized. Ierator actuates selector H to closefcontact 8 1013. Current then Howsfrom battery 51, through contact 8 10D, wire 57, c.ontact.7 7a of devicewD, wires 58 and .59,magnetv17R ot pilot valve R, and wire 54 baclrtobatteryy 51.A

will now assume that the ,op-V

At the same time, current flows from battery- 51 through contact 8 10),wire 65, back contact 66 et relay G, wire67, magnet 171 oiy valve P, andwire 54 back to battery y51. Valves R and P are both energized,therefore,

so that valve y3() is held closed, andvalve 27 is opened to admit fluidpressure through pipe 15 to the right-hand end of motor A. The brakingbars are therelfore moved totheir braking positions. lfJhen the pressureinjthe motor reaches pounds per squareY inch, contact 7 7@ of device Dopens, interrupting the circuit for magnet 17B, and allowing valve 27 toclose; ever 'so that the pressure is maintained in the motor. lt thepressure ,in the motor becomes greater than 251bs. per squareinch,.contact 7 7b ot devicel)` will close,'and current from battery 51will owthrough contact 8 1OD,

Valve remains closed how` wire 57 contact 7 7b wires 17 and 43 windingof relay Gr, and wire 5st back to'batteryv 51. Relay .G willV thenbecome energized, opening, at bach contact 66, the circuit :tor magnet17T. Valve 30 will then open to conneet the right-hand end ofmotor'Awith at-V e' mosphere. Vllfhen the pressure has V.beenl re-yduced to 25 lbs. per equareinch, contact 7 7 of devicerl) willopen,`aiid relay Gwill close .tore-energize magnet 1.71. llt Vwill beseen,

therefore, that when lever 8 is niovedfinto Vengagement withcontact/10D, the'rp'ress'ure in the right-hand end of the cylinder isinain Vles engagement with,y Contact 10E, current flows, V

'from batter 51 throiwh coiitact3 10,-E wire a 'l' rf? 1 b' *a 7 60,contact 7 7 L of device la, wires 61, 58 and 59, magnet 17B, and wire511'baclrto battery Under `these conditions contact 8 1OPv Y lll) 8 1OE,wire G0, contact 7 7" yotdevice-E,YY

wires VZ19 and 4:8, winding of relay G, and wire 5d back I to batteryA51. .Relay G therefore opens bach contact 66 to openvalve 30 until thepressure ydrops to lbs. per square inch.

-' YV hen Contact 3 1O1f` ot'selector H is closed,

the circuit for magnet 17R is from battery 51, through contact 3 1OF,wire V62, contact17 7a o1 device F, wires 63, 61,58 and 59, magnetA 1YR,and lwire back to battery 515Y The pressure is then maintained at'75lbs. per square inch, and if this value is exceeded,

y the cylinder is' then exhausted until the rewhich the lever thenoccupies.

current from battery 51 flows over contact f5-10F, wire 62,. contacty7e-7h' of device F, wires 50, 49 and d8, winding of relay G, and wire54 back to battery 5 decrease the pressure in the motor to the value atwhich Contact -Tb of device F opens. Finally, when contact 8--10Risclosed, current is supplied directly to magnetli'R and the full fluidpressure existing pipe 38 is then supplied to the motor.

If the operator wishes to restore the appa'- ratus to its normalcondition, hefirst moves the lever S to the position in which it isillusl trated in the drawing, so that contact 8-101 isvopen, therebycle-energizing magnetsY 17p and 17, and allowing the fluid pressure inthe right-'hand yend of' cylinder Ato exhaustl to atmosphere throughvalve and port 3l. Thev operator then closes contact 8-lON, therebyreversing valve N, and supplying fluid pressure to the left-hand end ofcylinder A. The piston 1st then returns to its righthand position andthe braking bars are moved to their Vnon-braking position. If theoperator then opens contact fie-10N, the consequent cle-energization ofmagnet 17N restores the apparatus to its normal condition by venting theleft-hand end of cylinder A to atmosphere through valve 33 and port ,34.

It should be particularly pointed out that if lever 8 is moved to aposition correspondingto a lower pressure than that existing in cylinderA, relay Gvwill immediately become energized to open valve 30. Thepressure in corresponds to the position By this automatic pressurereduction, the apparatusalways insures that the pressure in the cylinderexactly corresponds to the lever position.

Although I have herein shown and described only one form of motorcontrolling apparatus embodying my invention, it is understoodthatvarious changes and modifications may be made therein within the scopeof the appended claims without departing from the spirit and scope of myinvention.

Having thus described my invention, what I claim is: l

l. In combination, a fluid'pressure motor,

sultant pressure a first magnet for controlling Vthe admission of'fluidto said motor, a second magnet for governing the exhaust of fluid fromsaid inotor,'a relay at times controlled in accordance rwith thepressure in said motor, a manually operable lever, a circuit for saidfirst magnet Vcontrolled by said lever, and a circuitfor said secondmagnet controlled by said lever and by said relay.

2. In combination, a fluid pressure motor,

a first magnet'for controlling the admission of fluid to said motor, aysecond magnet for governing the exhaust of fluid. from said motor,mechanism responsive to the pressure in As a result, mag-v net 17p 1sfle-energized and valve 30 opens tosaid inctor, a manually operablelever, a relay controlled by said lever and by said mechanism, a circuitfor said first magnet controlled by said lever and by said mechanism,and a circuit for said secon-d magnet controlled by said lever and bysaid relay. Y

f 3. In coml'ination, a fluid. pressure motor, a first magnet forcontrolling the 'admission of fluid to said lmotor, afsecond magnet forgoverning the exhaust of fluid from said motor, a plurality of contactsresponsive to the pressure insaid motor and arranged to operate `atdifferent values of said pressure, a

manually operable lever,'a plurality of circuit-s for 'said first magnetall controlled by said lever and each controlledby a difi'erent one ofsaid contacts, a relay, means for energizing said relay when any one ofsaid circuits Iis closed and the pressure in the motor is above theoperating value of the correspondingcontact, and means for energizingsaid second magnet when any one of said circuits is closed provided saidrelay is -de-energized.

In combination, a fluid pressure motor, a first magnet for controllingthe admission of fluid to said motor, a second magnet for governing theexhaust of fluid from said motor, a firstl lcontact arranged to beclosed when and only when the pressure in said motor is below a certainvalue, a secondcontact arranged to be closed when and only when thepressure inthemotor is above said certain value, la manually controlledcontact, a circuit for said first magnet, including said first Contactand said manually controlledk contact, a relay provided with a vcircuitincluding said second contact, and means for energizing said vsecondmagnet when said manually controlled contact is closed and when saidrelay is deenergized.

5. In combination, a fluid pressure motor. a first magnet forcontrolling the *admissionl of fluid to said motor, a second magnet forgoverning the exhaust of fluid from said motor, a relay, manuallycontrolled means for supplying current to-said relay or to said firstmagnet according as the pressure in said motor is below or above acertain value, and a circuit for 'said second magnet controlled by saidrelay and by said manually controlled means.

6. In combination, a fluid pressure motor, a firstmagnet for controllingthe admission of fluid to saidmotor, a second magnet for' governing theexhaust of fluid froinsaid motor, a pressure `responsive device having afirst vand a second contact arranged to be Vclosed. according as thepressure said motor is above or below a certain value, re-

spectively, a manually operable Contact, a relay, a circuit for saidfirst magnet including said first contact and said manually Voperuablecontact, a circuit for said relay including said second Contact andsaid manually yoper- 'able Contact, and means effective whenD said.manually -operable conaet` 1s closed and when said relayr iscle-'energized tosupply current y bers, a manually .operable lever"Connec'lerl l Willi ube-V 'lree terminals 'of said source and movableinto engageuien; with a selected one of sa-icl 1ne1nbers,`a pluralityyof. fluid pressure responsivefleviees each operating lo eenneot anassociated one of said eonlzzwtV nieinbers with the free. Jcerrninal ofsaicl relay vor Wilt-l1 tliefree terminal of said Vfirstinagnetaceorcling. as the pressure in said inoor is above or Y below adefinite value which is 'different for 7. In combination, a'lluiclpressure motor,l

vdifferent devieesfancl means effective Wnen said lever engagesanyfoneof Vsaid Contact members and When saldyrelay 1s energized tosupply current 'to said` second magnet.

a brakingbar located inthe traelrway, a fluid,

pressure motor for operating saicl'bar, a first magnet forconrollingbeadmission of fluid to said motor a seeonclinaonet forcontrolf 3 b ling the exhaust of fluid 'fron'i the motor, 'a

Jluralit yoi' (leviees resUonsi-ve to 'elie'fiuicl f pressure in 'saidmeier, a Vvmanually operable lever, means for eentrollii saidrstinairnei by a selected one of saiclfclevices:according to theposition of said lever,y .a relay,v ineens Y controlled by said `leverfor placing saicll relayy underltlie eonlrol ol"tbersa1ne .deviceWliiehl iseoirerollingv said :rsln n'iagnet, and

a eircuitv'forvsaicl second magnetcontrollecl V'bys'aicl relay and bysaid lever.v r

lntestimonyxvbereof I affix inyvsignat'ure.

1 NoRvAL Resinas.

